Windmill rotation detection/management device and wind power generation system

Abstract

An apparatus comprising: a first input that receives a first rotational speed information of a windmill mechanically generated by a mechanical rotation detection unit; a second input that receives a second rotational speed information of the windmill based on an alternating current output of a generator attached to the windmill; and a controller configured to compare the first and second rotational speed information, to determine whether a difference between the first and second rotational speed information is greater than a predetermined value and to execute a predetermined anomaly processing in response to the difference being greater than the predetermined value.

Description

CROSS REFERENCES TO RELATED APPLICATIONS[0001]This application is a continuation application of International Application No. PCT / JP2009 / 055429, filed Mar. 19, 2009, the entire contents of which are incorporated herein by reference. PCT / JP2009 / 055429 claims priority to JP 2008-074659, filed Mar. 21, 2008.TECHNICAL FIELD[0002]The present invention relates to a windmill rotation detection / management device and a wind power generation system, which are capable of appropriately utilizing rotation count information for management of over-rotation or the like, while increasing reliability of windmill rotation detection.BACKGROUND ART[0003]A wind power generation system utilizing a windmill is generally provided with: a windmill body for receiving a wind and generating torque; and a generator for generating electric power by means of the torque generated in the windmill body. In such a windmill, there is a possibility that appropriate charging cannot be performed depending upon whether a w...

AI Technical Summary

Benefits of technology

The present invention provides a windmill rotation detection / management device that can reliably detect the rotation of the windmill and manage power utilization. The device uses a mechanical detection unit and an electrical detection unit to input rotation count information, and an anomaly processing system to determine if there is a difference in the rotation count between the two units. This allows for effective utilization of windmill rotation information and prevents damage to the windmill due to incorrect control. The device can be easily integrated into existing windmill systems and can be retrofitted without requiring major modifications.

Problems solved by technology

However, a mechanical detection unit such as a rotational speed detector is failure-prone.

Thus, once a failure occurs if a rotation control system is configured exclusively depending upon a mechanical detection unit such as the abovementioned control device, rotation information cannot be acquired and power management cannot be appropriately performed.

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